Krups 7230 releases pressure into tablet tray
Posted by: Hiropro October 11, 2014 01:32 pm
Hello everyone,
I have a Krups Espresseria Automatic Type 7230 with the following problem. When the brewing process is finished and the brewing tank opens, a strong pressure wave escapes upwards into the taplet shaft. Looking into the machine, without a cover in the tablet compartment, steam and coffee leftovers almost splashed in my face and landed under the blanket. I have opened the machine, it is correspondingly dirty with coffee leftovers. This can't be normal. Does anyone know the problem?
Posted by: rudi-03 October 11, 2014 02:43 pm
Hello,
>Probably there is a blockage or the drainage valve is no longer working correctly. Check / clean the components (brewing piston, brewing ram, drainage valve and hoses) accordingly.
Posted by: Hiropro October 11, 2014 02:49 pm
I also suspect there's a constipation. I guess I'll have to take the machine apart and clean it.
Posted by: Hiropro October 12, 2014 12:12 pm
A possible candidate is a hose leading from the radiator to the drainage valve.
The hose is bent as you can see on the picture. I have turned the hose a little so that the kink is almost eliminated. Let's see if that's enough. Where do you get hoses like that? There's no such thing in hardware stores.
Posted by: Hiropro October 12, 2014 12:21 pm
In addition, the lower sealing ring of the pressure cylinder is slightly crumbled off.
Posted by: Hiropro October 12, 2014 01:29 pm
I have assembled the machine and lo and behold, it releases the pressure again into the collecting tray. So it was the bent hose.
Posted by: kaffeechris October 12, 2014 11:15 pm
Hope you have renewed the two piston seals too.
MfG Chris
Posted by: Hiropro October 12, 2014 11:49 pm
If you have already ordered, I have assembled the device for testing purposes only. But it also works with a ring. 
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